
.fl {
  display: flex;
}

.flc {
  display: flex;
  flex-direction: column; 
}

.fl1 {
  flex: 1;
}

.fls{
  flex-shrink: 0;
}

.w,
.hw {
  flex-wrap: wrap;
}

.c,
.hc {
  justify-content: center;
}

.start,
.hstart {
  justify-content: flex-start;
}

.end,
.hend {
  justify-content: flex-end;
}

.ar,
.har {
  justify-content: space-around;
}

.bt,
.hbt {
  justify-content: space-between;
}

.vc {
  align-items: center;
}

.vstart {
  align-items: flex-start;
}

.vend {
  align-items: flex-end;
}

.vstr {
  align-items: stretch;
}

.hv,
.hvc {
  justify-content: center;
  align-items: center;
}

/* // -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→
// -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→
// -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→
// -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→
// -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→
// -------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→→→→-------→→→→→ */
/* // 合并：水平和垂直，有时会更好用！ */
.flvc {
  display: flex;
  align-items: center;
}

.flvend {
  display: flex;
  align-items: flex-end;
}

.flvstr {
  display: flex;
  align-items: stretch;
}

.flvstrc {
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.flvcc {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flvcend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.flvcbt {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flcvcbt {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.flvcar {
  display: flex;
  align-items: center;
  justify-content: space-around;
}